Question
Easy
Solving time: 2 mins
Choose the correct statement from the following:
(A) Cleistogamous flowers always exhibit autogamy
(B) Chasmogamous flowers always exhibit geitonogamy
(C) Cleistogamous flowers exhibit both autogamy and geitonogamy
(D) Chasmogamous flowers never exhibit autogamy
Found 2 tutors discussing this question
Discuss this question LIVE
13 mins ago
Text solutionVerified
(A) The pollination that occurs in opened flowers is called chasmogamy. It is of two types, that is, self-pollination (autogamy) and cross-pollination. Cross-pollination is of two types, that is, geitonogamy and xenogamy. So, we can say that chasmogamous flowers exhibit both autogamy (self-pollination) and allogamy (cross pollination).While, in cleistogamous flower the anthers and stigma lies close to each other within the closed flowers. When anthers dehisce in the flower buds, pollen grains come in contact with the stigma for effective pollination. Thus, these flowers are invariably autogamous as there is no chance of cross-pollen landing on the stigma.
Was this solution helpful?
77
Share
Report
One destination to cover all your homework and assignment needs
Learn Practice Revision Succeed
Instant 1:1 help, 24x7
60, 000+ Expert tutors
Textbook solutions
Big idea maths, McGraw-Hill Education etc
Essay review
Get expert feedback on your essay
Schedule classes
High dosage tutoring from Dedicated 3 experts
Practice questions from Oswaal CBSE MCQs Chapterwise For Term I II, Class 12, Biology (Oswaal)
Question 1
Easy
Views: 5,929
(A) Parthenocarpy
(B) Apomixis
(C) Vegetative propagation
(D) Sexual reproduction.
Question 2
Easy
Views: 5,233
Reason (R) : After fertilization the ovary develops into fruits and ovule develops into seed.
(A) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(B) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
(C) Assertion (A) is true but reason (R) is false.
(D) Assertion (A) is false but reason (R) is true.
Question 3
Easy
Views: 5,627
(A) Coleorhiza and coleoptile
(B) Coleoptile and scutellum
(C) Cotyledons and scutellum
(D) Hypocotyl and radicle.
Question 4
Easy
Views: 5,222
(A) Stigma, ovule, embryo sac, placenta
(B) Thalamus, pistil, style, ovule
(C) Ovule, ovary, embryo sac, tapetum
(D) Ovule, stamen, ovary, embryo sac
Practice more questions from Sexual Reproduction in Flowering Plants
Question 4
Hard
Views: 5,600
Practice questions on similar concepts asked by Filo students
Question 1
Views: 5,380
Question 2
Views: 5,276
Question 4
Views: 5,814
Stuck on the question or explanation?
Connect with our Biology tutors online and get step by step solution of this question.
231 students are taking LIVE classes
Question Text | Choose the correct statement from the following: (A) Cleistogamous flowers always exhibit autogamy (B) Chasmogamous flowers always exhibit geitonogamy (C) Cleistogamous flowers exhibit both autogamy and geitonogamy (D) Chasmogamous flowers never exhibit autogamy |
Topic | Sexual Reproduction in Flowering Plants |
Subject | Biology |
Class | Class 12 |
Answer Type | Text solution:1 |
Upvotes | 77 |